Question

I have a modal dialog, and need to hide the Close (X) button, but I cannot use
ControlBox = false, because I need to keep the Minimize and Maximize buttons.

I need to hide just Close button, is there any way to do that?

Thanks a lot!

Update: I had permission to disable it, which is simpler 🙂 Thanks all!

Answer 1

You can’t hide it, but you can disable it by overriding the CreateParams property of the form.

private const int CP_NOCLOSE_BUTTON = 0x200;
protected override CreateParams CreateParams
{
    get
    {
       CreateParams myCp = base.CreateParams;
       myCp.ClassStyle = myCp.ClassStyle | CP_NOCLOSE_BUTTON ;
       return myCp;
    }
}

Source: http://www.codeproject.com/KB/cs/DisableClose.aspx